Evaluation of Climate Quality Grade of Loquat Based on Climate Index

Lu Bingbing; Lu Wenhao; Sun Cailiang; Lin Wen; Chen Jiajin; Sun Chaofeng; Wu Li; Huang Chuanrong

doi:10.16765/j.cnki.1673-7148.2025.06.004

Abstract：To find out the climatic quality of loquat in Fujian Province,taking the loquat cultivar"Jiefangzhong"in Putian City of Fujian Province as an example,we use the meteorological data of 23 re-gional meteorological stations in Putian City over the years 2013-2021 and the detection data of physical and chemical components of loquat quality at 24 picking sites in 2021 to analyze the key period and key meteorological factors affecting loquat quality and determine the indexes and grading standards of loquat climatic quality.The weight of each characterization index is determined by analytic hierarchy process.The weighted index summation method is used to construct the evaluation model of loquat climatic quality,and the K-means clustering analysis method is used to divide the loquat climatic quality grades.Moreo-ver,the climate quality evaluation of Putian loquat in 2021 is carried out.The results show that the key climate indexes affecting loquat quality are 30 d sunlight hours before picking,20 d diurnal temperature range before picking,30 d effective accumulated temperature higher than or equal to 10.0℃before picking,and the number of rainy days in 20 days before picking.Based on these four climatic indexes,the climate quality evaluation index model of loquat is established as follows:In accordance with the cli-matic quality index,the climate quality of loquat is divided into the following levels:"Excellent"(0.75≤Ic<1),"Good"(0.45≤Ic<0.75),"Satisfactory"(0.20≤Ic<0.45),"Average"(0≤Ic<0.20).With the above standard levels,the climatic quality grade of loquat at 24 loquat production bases in Pu-tian City in 2021 is evaluated,and the results are that the"Excellent"grade accounts for 29.2%,and the"Good"grade accounts for 70.8%.The coincidence rate between the evaluation results of climatic quality grade and the actual quality grade difference of loquat≤1 is 91.7%.